Parasitic Fungi of Illinois. 197 
Hypogenous; spots pallid or none; sori oblong or linear, sometimes 
regularly arranged at equal intervals in long parallel lines, narrow, sur- 
rounded by the ruptured epidermis, black; spores narrow, oblong-cla- 
vate or elongated, septate above the middle, strongly constricted, having 
the lower cell more narrow than the upper, and cylindrical or slightly 
tapering downwards, .0018-.0024 in. long, ‘0006 in. broad; peduncle 
colored, thick, very short.—Peck, XXV. Rep. N. Y. Mus., p. 123. 
On leaves of Scirpus atrovirens: Piatt, Aug. 16, 1093; 
Cook, Sept. 5, 1451. 
P. windsoriz, Schw. 
IL., III. Hypogenous, occasionally somewhat amphige- 
nous. Sori small, little elevated, irregularly scattered, very 
numerous, sparingly confluent, linear or oblong, soon naked, 
the ruptured epidermis scarcely evident; uredospores subglo- 
bose or obovate, epispore medium thick, sharply echinulate, 
rather deep brown, 18-24 »; teleutospores broadly elliptical or 
obovate, slightly or not at all constricted at the septum, mostly 
obtusely rounded at the ends, upper segment mostly larger, 
vertex slightly thickened, smooth, 18-21 by 27-89 »; pedicel 
about the length of the spore or shorter, stout, rather deeply 
colored. 
On Muhlenbergia: Stephenson, Sept. 18, 5834, II., IIT. 
P. graminis, Pers. 
I. Hypogenous. Spots definite, usually small, purple, 
somewhat thickened; xcidia irregularly crowded, or sometimes 
circinate, short, border narrow, numerously lacerated, little re- 
curved; spores subglobose or angular, epispore thin, minutely 
tuberculate, contents fine-granular, 11-16 #; spermagonia mi- 
nute, elustered, not usually numerous, opposite the zcidia. 
II., Amphigenous. Sori linear, on the leaves short and 
scattered, on the leaf-sheaths often confluent in long lines, 
orange-yellow; spores narrowly obovate or elliptical, epispore 
thick, strongly echinulate, 18-21 by 27-36 z. 
III. Sori linear to elliptical, often confluent in long lines, 
mostly on the leaf-sheaths, rather prominent, soon naked, black; 
spores clavate or narrowly elliptical, mostly somewhat con- 
stricted, vertex strongly thickened, often pointed but some- 
